Bariatric Medicine Institute

About Us

Welcome to Bariatric Medicine Institute

Bariatric Medicine Institute is dedicated to providing compassionate, comprehensive care for individuals seeking sustainable weight loss and improved overall health. Our team of experienced medical professionals specializes in medically supervised weight management, combining the latest evidence-based treatments with personalized support tailored to each patient’s unique needs. We understand that weight loss is not just about numbers on a scale but about enhancing quality of life, boosting confidence, and reducing the risk of chronic diseases such as diabetes, hypertension, and heart disease. At Bariatric Medicine Institute, we empower our patients with education, advanced therapies, and ongoing motivation to help them achieve and maintain lasting results.

Our approach is holistic and patient-centered, focusing on long-term success rather than quick fixes. From initial consultation through every step of the weight loss journey, we provide individualized plans that may include nutritional counseling, medical weight loss options, hormone optimization, and lifestyle coaching. We are committed to creating a supportive environment where patients feel heard, respected, and encouraged. At Bariatric Medicine Institute, your health goals become our mission, and we strive to inspire positive change that lasts a lifetime.

Transforming Lives, One Healthy Step at a Time
margarita mcdonald
Medical Director – Margarita McDonald, MD, Bariatrician

Dr. McDonald has been a physician for over 18 years. She is board-certified in both Obesity and Family Medicine. She is a member of the Obesity Medicine Association, American Academy of Family Physicians and the American Medical Association.

She is a graduate of Ursinus College, Tufts University School of Medicine and the Abington Family Medicine Residency program.

She has been passionate about Obesity Medicine for over 15 years and felt that the current management programs available to patients were not focusing on the individual patient.  BMI looks at the complete person and teaches it's patients how to adapt to life's changes.

She believes that we cannot control our genetics…  but what we can control is what we put in our body and how we treat it

Dietitian - Liza Aschettino, MS, RD, LDN

Liza is a non-diet, weight-inclusive Registered Dietitian who is passionate about helping patients improve their relationship with food for both mental and physical health.

She chose to pursue a career in nutrition to help others better manage their health, inspired by her grandmother with diabetes and cardiac disease.  As an overweight child and teen, she struggled with diet culture and disordered eating patterns and as she grew older, became interested in the way food impacts the body, especially in how important it can be in preventing and/or managing diseases.

Since becoming a dietitian, she has experience working with a variety of different conditions amongst many different cultures. Her goal is to help you transform the way you think about food, and help you reach your personal goals. She emphasizes food freedom as well as macronutrient balance, mindfulness at mealtimes as well as having nutritious, wholesome foods incorporated into your daily routine.

She is excited to have the opportunity to provide you with the knowledge and tools to live a less restrictive, more balanced and healthful lifestyle!

dietician Liza
Atif Lanier
Personal Trainer - Atif Lanier, BA, MCPT

Atif is a Master Certified Personal Trainer with a Bachelor of Arts in Human Biology & Biological Anthropology from Temple University.

Fitness has always been a part of his life, starting with weightlifting at the age of 13, transitioning to the studying Boxing and Martial Arts.

As a trainer, he has experience training children, adults, seniors and those with physical disabilities. He combines strength training, functional training and self-defense to promote weight loss, improved body composition and flexibility.

Atif has a varied life outside of fitness as an accomplished actor, writer and producer. He’s been on TV as well as the big screen and has traveled across the U.S and abroad as a speaker. He even brought his fitness skills to film as a stunt football player for 16 years in commercials, film, TV and print.

Counselor - Muniyra Muhammad, MS, NCC, LPC

My name is Muniyra Muhammad, LPC - licensed professional counselor.  I have worked in many different communities in and around the city of Philadelphia.

Offering a warmhearted, thoughtful and authentic experience to individuals, couples and families seeking help in a variety of ways; experienced in diverse cultural backgrounds, different races, ethnicities, gender, age, and social class. I take a person-centered approach to my practice. Implementing CBT, TFCBT and psycho dynamic modalities.

The goal is to reframe negative thoughts, create positive outcomes, work through family relational conflict, promote mindfulness exercises and activities, healthy eating strategies, restful sleep and holistic approaches to healing.

I look forward to helping you take the next step in your journey.

Muniyra
black woman
Take Control of Your Health, On Your Terms

Invest in Lasting Wellness—Inside and Out.


Imagine a care experience that’s focused on you—not the clock. At the Bariatric Medicine Institute, we put your goals, comfort, and results at the center of everything we do. From personalized weight loss plans to non-invasive body sculpting, we’re here to help you feel your best—confidently and comfortably.
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